linux-kernel - Re: default IRQ affinity change in v2.6.27 (breaking several SMP PPC based systems)

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Message-ID: <4902086E.6030900@freescale.com>
Date:	Fri, 24 Oct 2008 12:39:58 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Kumar Gala <galak@...nel.crashing.org>
CC:	Chris Snook <csnook@...hat.com>,
	LinuxPPC-dev list <linuxppc-dev@...abs.org>,
	tglx@...utronix.de,
	linux-kernel Kernel <linux-kernel@...r.kernel.org>,
	maxk@...lcomm.com
Subject: Re: default IRQ affinity change in v2.6.27 (breaking several SMP
 PPC	based systems)

Kumar Gala wrote:
> So why not just have x86 startup code set irq_default_affinity = 
> CPU_MASK_ALL than?

That doesn't really solve the problem, as a user could still manually 
set an invalid affinity.  The MPIC driver should reduce the affinity 
itself to what the hardware can handle.

-Scott
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